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In this chapter, you ve created your own web page using Popfly s Page Editor. You ve learned how to customize pages with styles and layouts and learned how to insert shared mashups for the world to see. In the next chapter, we are going to explore four more ways you can share your mashups with users who are outside of the Popfly community.

You can turn the percentage completed text on and off with the textVisible property and you can alter the text to suit your application by using the format property The format property is a string in which any occurrence of %p is replaced with the current percentage, %v is replaced with the current value, and %m is replaced with the maximum value Figure 3-19 shows a set of progress bars created in Designer The slider at the top of the dialog is connected to each slider through valueChanged(int) to setValue(int) connections By moving the slider, you can set the progress The top progress bar has the default style; that is, the format property is %p%, and the text is visible The next progress bar has the format text set to "%v out of %m steps completed" The third has hidden text.

org through a TCP connection to its FTP port Note that several IP addresses were returned because this service, to spread load, is located at several different machines on the Internet You should generally always use the first address returned, and if a connection fails, then try the remaining ones, because there is intelligence built into the name-resolution system to properly randomize the order in which you receive them By always trying the first server IP address first, you will offer the various servers a workload that is in the proportion that the machine administrators intend Here is another query, which describes how I can connect from my laptop to the HTTP interface of the IANA that assigns port numbers in the first place: >>> getaddrinfo('ianaorg', 'www', 0, socketSOCK_STREAM, 0, .. socketAI_ADDRCONFIG | socketAI_V4MAPPED) [(2, 1, 6, '', ('192043.

The progress bar at the bottom has minimum and maximum set to zero, which means that it keeps moving to show progress The printed figure does not show that it moves continuously there is no need to call setValue or any other method to get movement..

8', 80))] The IANA web site is actually a good one for demonstrating the utility of the AI_ADDRCONFIG flag, because like any other good Internet standards organization their web site already supports IPv6 It just so happens that my laptop can speak only IPv4 on the wireless network to which it is currently connected, so the foregoing call was careful to return only an IPv4 address But if we take away our carefully chosen flags in the sixth parameter, then we will also be able to see their IPv6 address: >>> getaddrinfo('ianaorg', 'www', 0, socketSOCK_STREAM, 0) [(2, 1, 6, '', ('1920438', 80)), (10, 1, 6, '', ('2001:500:88:200::8', 80, 0, 0))] This can be useful if you are not going to try to use the addresses yourself, but if you are providing some sort of directory information to other hosts or programs..

The last detail in the test dialog is the Reset button. Its clicked signal is connected to the reset slot of all the progress bars. When clicking it, you reset the progress bars. This means that the value of each progress bar is set to zero, and that the texts of the progress bars are hidden until the value is changed from a valueChanged(int) signal emitted when you move the slider.

One last circumstance that you will commonly encounter is where you either are making a new connection, or maybe have just received a connection to one of your own sockets, and you want an attractive hostname to display to the user or record in a log file. This is slightly dangerous because a hostname lookup can take quite a bit of time, even on the modern Internet, and might return a hostname that no longer works by the time you go and check your logs so for log files, try to record both the hostname and raw IP address! But if you have a good use for the canonical name of a host, then try running getaddrinfo() with the AI_CANONNAME flag turned on, and the fourth item of any of the tuples that it returns that were always empty strings in the foregoing examples, you will note will contain the canonical name: >>> getaddrinfo('iana.org', 'www', 0, socket.SOCK_STREAM, 0, ... socket.AI_ADDRCONFIG | socket.AI_V4MAPPED | socket.AI_CANONNAME) [(2, 1, 6, '43-8.any.icann.org', ('192.0.43.8', 80))]

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